1. If + S + Hiện tại đơn , S + tương lai +V
VD :
1. If people use too much fertileiser, lands will be spoiled
2. If light pollution happens, animals will change their behaviour pattern
3. People will get more diseases If the water is contaminated
4. If the land polluted , the farmer will be unable to grow crops
5. If we place dusbins in many places , people won't throw rubbish everywhere
2. If +S + QK (were) , S + would , could , should , might +V
1. Tress and grasses could grow here If the soild weren't badly polluted
2. I would go to Sam Son Beach If today were Sun day
3. If they weren't poor , they could help us
4. If he did his homework , he wouldn't be alway punished
5. If I'm weren't baded at English , I could do homework
3. If + S + QKHT , S + S + would , could , should , might +have + PII
1. If I had been you yesterday, I wouldn't have done that
2. If I had seen you , I would have said hi
3. If I had known you were in hospital , I would have gone to visit you
4. If she had enough money, she could have done this trip to Singapore
5. If you had taken his advice, you would be rich now
